Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-03-14
1990-06-19
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303115, 303119, 303110, B60T 832, B60T 848
Patent
active
049347624
ABSTRACT:
A hydraulic brake system in which oil pressure control valves are respectively interposed between a master cylinder as well as an oil pressure source for generating a fixed oil pressure, and corresponding brakes. Each of the oil pressure control valves includes a valve casing having a first input port communicating with the master cylinder, a second input port communicating with the oil pressure source, an output port communicating with the corresponding brake, and an oil pressure chamber communicating with the output port. A spool is slidable fitted in a bore in the valve casing with a pressure receiving face at one end thereof confronted to the oil pressure chamber, for bringing the second input port and the oil pressure chamber into communciation on a side contracting the oil pressure chamber and for bringing the first input port and the oil pressure chamber into communication on a side expanding the oil pressure chamber. An electrical-driving device is interlockingly coupled to the other end of the spool so as to afford a thrust corresponding to an energizing power level toward the side contracting the oil pressure chamber. Thus, the oil pressures of the brakes can be controlled at quick response by controlling the energizing power level of the electrical-driving device.
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Butler Douglas C.
Honda Giken Kogyo Kabushiki Kaisha
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